114 Maine: agricultural i:xpe;rime:nt station. 1903. 



Because of the hot, dry summer, the growing season of the 

 northwest is much shorter than in Aroostook county. Wheat 

 harvest is from a month to six weeks earher in Minnesota than 

 in Maine. For this reason we should expect a difference in the 

 size and composition of the berry. In the sixteen samples of 

 Aroostook wheats the weight of 100 kernels varied from 2.825 

 to 3.969 grams, averaging 3.225 grams. The eight northwestern 

 wheats showed a greater uniformity in size, 100 kernels ranging 

 from 2.129 to 3.087 grams, with an average of 2.398. Omitting 

 sample 6622, the range was from 2.129 to 2.604 grams. This 

 difference in weight was accompanied by a difference in compo- 

 sition, the difference being chiefly in the lower protein and higher 

 nitrogen-free extract of the Maine wheats. This difference is 

 more clearly brought out in the following table, where the 

 analyses of the different wheats are calculated to a water-free 

 basis. 



AVERAGE COMPOSITION AND HEAT OF COMBUSTION OF MAINE AND 

 WESTERS GROWN WHEATS. CALCULATED TO A WATER-FREE BASIS. 





O 3 . 



=5 S M 



oj 5 p 



16 

 12 

 25 



Maine wheats 



Western wheats... 

 Minnesota wheats. 



Calo- 

 ries. 



4.424 



4.437 



*4.32S 



* Calculated. 



Experiments upon Growing Northwestern Wheats in 



Maine. 



Marked as are the differences in composition of wheats that 

 have been grown many years in Aroostook county, the immediate 

 effect of change of climate upon carefully bred wheat is not so 

 clear. It is important for the Maine grower to produce a wheat 

 with as high a protein content as possible. Practical men in 

 Aroostook county are unanimous in the opinion that wheats 

 grown from western seed change in size and appearance of the 



